// 格式化时间秒
String formatSeconds(double seconds, {fixed = 2}) {
  var sec = seconds.toStringAsFixed(fixed);
  var intSec = int.parse(sec.split('.')[0]);
  var lastSec = int.parse(sec.split('.')[1]);
  var time = Duration(seconds: intSec).toString().split('.')[0].split(':');
  return "[${time[1]}:${time[2]}.$lastSec]";
}
